From: Matti Aarnio <matti.aarnio@zmailer.org>
To: Ketil Froyn <ketil-kernel@froyn.net>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [ANNOUNCE] Ext3 vs Reiserfs benchmarks
Date: Tue, 16 Jul 2002 02:08:45 +0300 [thread overview]
Message-ID: <20020716020845.Z28720@mea-ext.zmailer.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0207152356430.19217-100000@lexx.infeline.org>; from ketil-kernel@froyn.net on Mon, Jul 15, 2002 at 11:59:48PM +0200
On Mon, Jul 15, 2002 at 11:59:48PM +0200, Ketil Froyn wrote:
> On 15 Jul 2002, Patrick J. LoPresti wrote:
> > Without calling fsync(), you *never* know when the data will hit the
> > disk.
>
> Doesn't bdflush ensure that data is written to disk within 30 seconds or
> some tunable number of seconds?
It TRIES TO, it does not guarantee anything.
The MTA systems are an example of software suites which have
transaction requirements. The goal has been usually stated
as: must not fail to deliver.
Practical implementations without full-blown all encompassing
transactions will usually mean that the message "will be delivered
at least once", e.g. double-delivery can happen.
One view to MTA behaviour is moving the message from one substate
to another during its processing.
These days, usually, the transaction database for MTAs is UNIX
filesystem. For ZMailer I have considered (although not actually
done - yet) using SleepyCat DB files for the transaction subsystem.
There are great challenges in failure compartementalisation, and
integrity, when using that kind of integrated database mechanisms.
Getting SEGV is potentially _very_ bad thing!
> Ketil
/Matti Aarnio
next prev parent reply other threads:[~2002-07-15 23:05 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20020712162306$aa7d@traf.lcs.mit.edu>
[not found] ` <mit.lcs.mail.linux-kernel/20020712162306$aa7d@traf.lcs.mit.edu>
2002-07-15 15:22 ` [ANNOUNCE] Ext3 vs Reiserfs benchmarks Patrick J. LoPresti
2002-07-15 17:31 ` Chris Mason
2002-07-15 18:33 ` Matthias Andree
[not found] ` <20020715173337$acad@traf.lcs.mit.edu>
[not found] ` <mit.lcs.mail.linux-kernel/20020715173337$acad@traf.lcs.mit.edu>
2002-07-15 19:13 ` Patrick J. LoPresti
2002-07-15 20:55 ` Matthias Andree
2002-07-15 21:23 ` Patrick J. LoPresti
2002-07-15 21:38 ` Thunder from the hill
2002-07-16 12:31 ` Matthias Andree
2002-07-16 15:53 ` Thunder from the hill
2002-07-16 19:26 ` Matthias Andree
2002-07-16 19:38 ` Thunder from the hill
2002-07-16 23:22 ` close return value (was Re: [ANNOUNCE] Ext3 vs Reiserfs benchmarks) Zack Weinberg
2002-07-17 1:03 ` Alan Cox
2002-07-16 23:52 ` close return value David S. Miller
2002-07-17 1:35 ` Alan Cox
2002-07-17 0:20 ` David S. Miller
2002-07-17 1:05 ` Linus Torvalds
2002-07-17 1:05 ` David S. Miller
2002-07-17 1:23 ` Linus Torvalds
2002-07-17 11:51 ` Matthias Andree
2002-07-17 17:23 ` Andries Brouwer
2002-07-20 8:00 ` Florian Weimer
2002-07-20 16:45 ` Linus Torvalds
2002-07-26 0:06 ` EFAULT vs. SIGSEGV [was Re: close return value] Pavel Machek
2002-07-26 14:01 ` (no subject) Alexis Deruelle
[not found] ` <mailman.1026868201.10433.linux-kernel2news@redhat.com>
2002-07-18 0:01 ` close return value Pete Zaitcev
2002-07-18 0:10 ` Thunder from the hill
[not found] ` <mit.lcs.mail.linux-kernel/200207180001.g6I015f02681@devserv.devel.redhat.com>
2002-07-18 14:42 ` Patrick J. LoPresti
2002-07-18 15:13 ` Richard B. Johnson
2002-07-18 15:32 ` Sandy Harris
2002-07-18 23:47 ` Albert D. Cahalan
2002-07-19 16:12 ` Patrick J. LoPresti
2002-07-19 16:24 ` Joseph Malicki
2002-07-19 18:48 ` Patrick J. LoPresti
2002-07-19 19:25 ` Lars Marowsky-Bree
2002-07-19 19:30 ` Arnaldo Carvalho de Melo
2002-07-19 19:45 ` Joseph Malicki
2002-07-19 19:55 ` Arnaldo Carvalho de Melo
2002-07-20 18:25 ` Bernd Eckenfels
2002-07-20 23:06 ` Sandy Harris
2002-07-20 14:42 ` Andries Brouwer
2002-07-18 20:09 ` Hildo.Biersma
2002-07-18 23:55 ` Pete Zaitcev
2002-07-19 11:31 ` Hildo.Biersma
2002-07-19 16:16 ` Pete Zaitcev
2002-07-23 22:19 ` Bill Davidsen
2002-07-17 0:10 ` close return value (was Re: [ANNOUNCE] Ext3 vs Reiserfs benchmarks) Zack Weinberg
2002-07-17 1:45 ` Alan Cox
2002-07-17 18:24 ` Zack Weinberg
2002-07-22 16:42 ` Rogier Wolff
2002-07-17 8:00 ` Lars Marowsky-Bree
2002-07-17 15:49 ` Thunder from the hill
2002-07-17 2:22 ` Elladan
2002-07-17 2:54 ` Thunder from the hill
2002-07-17 3:00 ` Elladan
2002-07-17 3:10 ` Thunder from the hill
2002-07-17 3:31 ` Elladan
2002-07-17 4:17 ` Stevie O
2002-07-17 4:38 ` Elladan
2002-07-17 14:39 ` Andreas Schwab
2002-07-17 16:49 ` Elladan
2002-07-17 17:43 ` Linus Torvalds
2002-07-17 22:07 ` Elladan
2002-07-18 9:48 ` Ketil Froyn
2002-07-17 17:17 ` Andries Brouwer
2002-07-17 17:51 ` Richard Gooch
2002-07-17 7:34 ` close return value (was Re: [ANNOUNCE] Ext3 vs Reiserfs benchmarks Kai Henningsen
2002-07-15 21:59 ` Ketil Froyn
2002-07-15 23:08 ` Matti Aarnio [this message]
2002-07-16 12:33 ` Matthias Andree
2002-07-15 22:55 ` Alan Cox
2002-07-15 21:58 ` Matthias Andree
2002-07-15 21:14 ` Chris Mason
2002-07-15 21:31 ` Patrick J. LoPresti
2002-07-15 22:12 ` Richard A Nelson
2002-07-16 1:02 ` Lawrence Greenfield
[not found] ` <mit.lcs.mail.linux-kernel/200207160102.g6G12BiH022986@lin2.andrew.cmu.edu>
2002-07-16 1:43 ` Patrick J. LoPresti
2002-07-16 1:56 ` Thunder from the hill
2002-07-16 12:47 ` Matthias Andree
2002-07-16 21:09 ` James Antill
2002-07-16 12:35 ` Matthias Andree
2002-07-16 7:07 ` Dax Kelson
2002-07-12 16:21 Dax Kelson
2002-07-12 17:05 ` Andreas Dilger
2002-07-12 17:26 ` kwijibo
2002-07-12 17:36 ` Andreas Dilger
2002-07-12 20:34 ` Chris Mason
2002-07-13 4:44 ` Daniel Phillips
2002-07-14 20:40 ` Dax Kelson
2002-07-15 8:26 ` Sam Vilain
2002-07-15 12:30 ` Alan Cox
2002-07-15 12:02 ` Sam Vilain
2002-07-15 13:23 ` Alan Cox
2002-07-15 13:40 ` Chris Mason
2002-07-15 19:40 ` Andrew Morton
2002-07-15 15:12 ` Andrea Arcangeli
2002-07-15 16:03 ` Andreas Dilger
2002-07-15 16:12 ` Daniel Phillips
2002-07-15 17:48 ` Sam Vilain
2002-07-15 18:47 ` Mathieu Chouquet-Stringer
2002-07-15 19:26 ` Sam Vilain
2002-07-16 8:18 ` Stelian Pop
2002-07-16 12:22 ` Gerhard Mack
2002-07-16 12:49 ` Stelian Pop
2002-07-16 15:11 ` Gerhard Mack
2002-07-16 15:22 ` Andrea Arcangeli
2002-07-16 15:39 ` Stelian Pop
2002-07-16 19:45 ` Matthias Andree
2002-07-16 20:04 ` Shawn
2002-07-16 20:11 ` Mathieu Chouquet-Stringer
2002-07-16 20:22 ` Shawn
2002-07-16 20:27 ` Mathieu Chouquet-Stringer
2002-07-17 11:45 ` Matthias Andree
2002-07-17 19:02 ` Andreas Dilger
2002-07-18 9:29 ` Matthias Andree
2002-07-19 8:29 ` Matthias Andree
2002-07-19 16:39 ` Andreas Dilger
2002-07-19 20:01 ` Shawn
2002-07-19 20:47 ` Andreas Dilger
2002-07-15 21:14 ` Andreas Dilger
2002-07-17 18:41 ` bill davidsen
2002-07-16 8:15 ` Stelian Pop
2002-07-16 12:27 ` Matthias Andree
2002-07-16 12:43 ` Stelian Pop
2002-07-16 12:53 ` Matthias Andree
2002-07-16 13:05 ` Christoph Hellwig
2002-07-16 19:38 ` Matthias Andree
2002-07-16 19:49 ` Andreas Dilger
2002-07-16 20:11 ` Thunder from the hill
2002-07-16 21:06 ` Matthias Andree
2002-07-16 21:23 ` Andreas Dilger
2002-07-16 21:38 ` Thunder from the hill
2002-07-17 11:47 ` Matthias Andree
2002-07-18 14:50 ` Bill Davidsen
2002-07-18 15:09 ` Rik van Riel
2002-07-17 18:51 ` bill davidsen
2002-07-18 9:32 ` Matthias Andree
2002-07-15 12:09 ` Matti Aarnio
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